Climate and monthly weather forecast
Dundalk, MD

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The climate of Dundalk

Situated in the coastal state of Maryland, USA, Dundalk experiences a humid subtropical climate, also known as the Köppen climate classification Cfa. This classification features no distinct dry season, contributing to the year-round moist conditions.

Examining the meteorological conditions throughout the calendar reveals a varying tapestry of temperature trends and precipitation patterns. The mercury sees a fluctuation from a temperate 27.7°F (-2.4°C) in the cooler months to a maximum of 84.9°F (29.4°C) during the summer peak. Rainfall observations shift from a modest 0.24" (6mm) to a high of 1.06" (27mm), gracing the region with a consistent supply of moisture.

Considerably, the relative humidity remains fairly steady, ranging from 72% to 77%. This constant humidity contributes towards the subtropical identifiers of the region's climate category. The sea temperature, another key climate factor, fluctuates from a chilly 44.5°F (6.9°C) to a more balmy 77.5°F (25.3°C).

Dundalk receives about 0.31" (8mm) of snowfall in select winter months. Conversely, the months of August and July tend to be particularly warm, with temperatures reaching as high as 82.9°F (28.3°C) and 84.9°F (29.4°C) respectively.

The best time to visit Dundalk

A visitor seeking warm weather will discover that the best time to visit Dundalk is from June to September. During this period, the average high temperature stays above 76.8°F (24.9°C) and rainfall is at its peak, ranging from 0.67" (17mm) to 1.06" (27mm). Additionally, these months offer the most daylight hours, peaking at 14.9 hours in June. The highest sea temperatures, reaching up to 77.5°F (25.3°C), are in August, which is favorable for water-bound recreational activities.

The worst time to visit Dundalk

The months from December through February could be regarded as less desirable for those unwilling to tolerate lower temperatures. During these winter months, the average low temperature dips to as low as 27.7°F (-2.4°C). Besides cooler temperatures, these months also exhibit less sunlit hours with daylight registering at its lowest in December at about 9.5 hours. Rainfall fixtures are relatively low compared to other seasons, however, snowfall is at its highest during these months, with December seeing about 0.16" (4mm).

Spring weather in Dundalk

In Dundalk, Spring is characterized by gradually warmer temperatures, consistent rainfall, and longer days. The period from March to May witnesses daytime temperatures elevating from 50.4°F (10.2°C) to 71.8°F (22.1°C). Average night temperatures rise from 36.7°F (2.6°C) to 56.5°F (13.6°C). Rainfall during this time is fairly steady, moving from 0.55" (14mm) in March to 0.55" (14mm) in May. Pressure oscillates between 30.01" (762mm) and 30.08" (764mm), making conditions in Dundalk relatively pleasant during this season.

Summer weather in Dundalk

Dundalk's summer, ranging from June to August, is characterized by high temperatures, increased rainfall, and abundant sunshine. The day temperatures peak at 84.9°F (29.4°C) in July and nighttime temperatures rise up to 70.3°F (21.3°C). Rainfall reaches its maximum in August at 1.06" (27mm), alongside peak sea temperatures of 77.5°F (25.3°C). The average UV index also registers as one of the highest values of the entire year at an average of 6, urging visitors and residents to exercise caution and wear adequate sun protection.

Autumn weather in Dundalk

Autumn in Dundalk, from September to November, sees a gradual dip in temperatures, reduced daylight, and a decrease in precipitation. Daytime temperatures range from 76.8°F (24.9°C) in September to 53.4°F (11.9°C) in November. Night temperatures moderate from 62.4°F (16.9°C) to 41°F (5°C). Rainfall decreases from 0.24" (6mm) in September to 0.47" (12mm) in November. Pressure is relatively stable during this season, varying slightly from 30.03" (763mm) to 30.13" (765mm).

Winter weather in Dundalk

Winter in Dundalk sees a significant drop in temperatures, fewer daylight hours, and increased snowfall. Spanning from December to February, daytime temperatures go from 45.1°F (7.3°C) to a low of 38.8°F (3.8°C), while nighttime temperatures range between 34.5°F (1.4°C) and 27.7°F (-2.4°C). Snowfall occurs primarily in December and January with 0.16" (4mm) and 0.08" (2mm) respectively. Apart from the cold weather, visitors and residents experience shorter days with daylight hours decreasing to a minimum of 9.5 hours in December.

Weather in January

The year in Dundalk, Maryland starts off with a chilly atmosphere, enwrapped in 73% relative humidity. Frosty winds flow at 9.3mph (15km/h), carrying a sprinkling of snowfall with 0.31in falling, which is the highest in the year. Weather in January »

Weather in February

Transitioning away from January, February in Dundalk, Maryland sees relatively identical climatic conditions with slight elevations in temperature. Though snowfall witnesses a dip to 0.08in, wintry winds continue to create a brisk environment. Weather in February »

Weather in March

Welcoming spring, March exhibits the first substantial shift in Dundalk's weather patterns with average high temperatures climbing to 50.4°F (10.2°C). With daylight increasing to 12 hours, people start to spend more time outdoors, basking in the relative warmth. Weather in March »

Weather in April

April sees a further warming trend in Dundalk, Maryland, notably with temperatures peaking at 62.2°F (16.8°C). The city witnesses an increase in rainfall to 0.51in, hinting at the onset of rainier months ahead. With more daylight and fairer weather, outdoor activities become more popular, including waterfront activities. Weather in April »

Weather in May

May sets the stage for the warm season in Dundalk, as temperatures escalate considerably, reaching highs of 71.8°F (22.1°C). Rainfall continues its upward trend, prompting residents to keep umbrellas at hand. Summer-friendly activities start to gain momentum, with people frequenting beaches and parks under long daylight hours. Weather in May »

Weather in June

June sees Dundalk, Maryland swept in full summer exuberance, boasting average high temperatures of 79.7°F (26.5°C), marking the advent of the hot season. With sea temperatures rising to 68.2°F (20.1°C), beach-goers find more comfort in the water. Weather in June »

Weather in July

At its peak, summer in July presents sweltering heat, with the mercury soaring to the year's high of 84.9°F (29.4°C). The increase in temperature coincides with an increase in humidity, creating sticky conditions at times. Despite the heat, life bustles, embraced by the city's attractions and waterfront activities. Weather in July »

Weather in August

As the final month of summer, August continues to bathe Dundalk, Maryland in warm, sunny weather. Rainfall hits its annual high with 1.06in, interspersing hot days with refreshing showers. While outdoor activities remain popular, residents begin preparing for the eventual transition to cooler weather. Weather in August »

Weather in September

September ushers in the onset of Autumn, with temperatures subtly dipping to a comfortable 76.8°F (24.9°C). A noticeable drop in rainfall to 0.24in makes this the driest month of the year in Dundalk. Golden hues begin to dominate the city landscape as leaves start their transformation. Weather in September »

Weather in October

By October, Dundalk, Maryland fully embraces Fall, showcasing vibrant shades of autumnal foliage. Weather conditions take a turn towards the colder end of the spectrum, as winds clock up to 8.1mph (13km/h). While daytime still offers mild temperatures, nights witness a significant drop, reminding residents to layer up. Weather in October »

Weather in November

As autumn gives way to winter, November brings cooler temperatures and a decrease in daylight hours. An increase in relative humidity to 73% creates a chillier ambiance in Dundalk. Frosty mornings become more frequent, as does the need for warmer apparel. Weather in November »

Weather in December

Capping off the year, December showcases the full onset of winter in Dundalk, Maryland, with temperatures plummeting to an average minimum of 34.5°F (1.4°C). Fresh snowfall of about 0.16in creates a wintry scene, particularly around the festive Christmas period. Weather in December »
Updated: Jun 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

The coldest time of the year is January, with temperatures averaging a high of 38.8°F (3.8°C) and a low of 27.7°F (-2.4°C).

How much does it rain?

In Dundalk, Maryland, during the entire year, the rain falls for 84.4 days and collects up to 6.85" (174mm) of precipitation.

When does it snow?

January through March, November and December are months with snowfall.

When does it snow the most?

The month with the most snowfall is January, when snow falls for 1.7 days and typically aggregates up to 0.31" (8mm) of snow.

How much does it snow?

Throughout the year, there are 6.9 snowfall days, and 0.71" (18mm) of snow is accumulated.

What are the months with the lowest UV index?

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2.

When is the ocean coldest?

The month with the coldest seawater is February, with an average ocean temperature of 44.4°F (6.9°C).

What is the month with the least sunshine?

February has the least sunshine of the year, with an average of 5h of sunshine.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month?

April is the least humid month, with an average relative humidity of 72%.

When it does not snow?

April through October are months without snowfall.

What is the most humid month?

The most humid month is May, with an average relative humidity of 77%.

When is the highest UV index?

May through August, with an average maximum UV index of 6, are months with the highest UV index.

When are the longest days?

With an average of 14h and 54min of daylight, June has the longest days of the year in Dundalk.

What are the warmest months in Dundalk?

In Dundalk, July is identified by the average highest temperatures, reaching a peak of 84.9°F (29.4°C) and a low of 70.3°F (21.3°C).

What month has the most sunshine?

With an average of 10.9h of sunshine, July has the most sunshine of the year.

What is the wettest month?

August is the month with the most rainfall. Rain falls for 9.7 days and accumulates 1.06" (27mm) of precipitation.

What is the month with the warmest ocean?

The month with the warmest seawater is August, with an average ocean temperature of 77.5°F (25.3°C).

What is the driest month?

September is the month with the least rainfall. Rain falls for 6 days and accumulates 0.24" (6mm) of precipitation.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 30min of daylight.
Today
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Long-term
YearJFMAMJJASOND

Average temperature
Dundalk, MD

Average temperature - Dundalk, MD

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (38.8°F).

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

Average pressure
Dundalk, MD

Average pressure - Dundalk, MD

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed
Dundalk, MD

Average wind speed - Dundalk, MD

The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity
Dundalk, MD

Average humidity - Dundalk, MD

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is April (72%).

Average rainfall
Dundalk, MD

Average rainfall - Dundalk, MD

The wettest month (with the highest rainfall) is August (1.06").
The driest month (with the least rainfall) is September (0.24").

Average rainfall days
Dundalk, MD

Average rainfall days - Dundalk, MD

The month with the highest number of rainy days is July (10.3 days).
The month with the least rainy days is November (4.1 days).

Average snowfall
Dundalk, MD

Average snowfall - Dundalk, MD

The month with the highest snowfall is January (0.31").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days
Dundalk, MD

Average snowfall days - Dundalk, MD

The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature
Dundalk, MD

Average sea temperature - Dundalk, MD

The best month for swimming (with the highest average sea temperature) is August (77.5°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).

Average daylight / Average sunshine
Dundalk, MD

Average daylight / Average sunshine - Dundalk, MD

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days
Dundalk, MD

Average sunshine days - Dundalk, MD

The month with the most sunshine days is January (24.7 days).
The month with the least sunshine days is July (16.9 days).

Average UV index
Dundalk, MD

Average UV index - Dundalk, MD

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover
Dundalk, MD

Average cloud cover - Dundalk, MD

The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility
Dundalk, MD

Average visibility - Dundalk, MD

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Dundalk, Maryland, USA

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